Treatment of Cancer Pain with Epidural Butyl-Amino-Benzoate Suspension

Seven patients with intractable cancer pain received a total of ten epidural and two peripheral nerve blocks with a 10% aqueous suspension of n-butyl-p-amino-benzoate. All patients achieved good to complete pain relief. The daily requirement of narcotics was greatly reduced in all patients and entirely eliminated in some. Pain relief persisted until death in all patients except one where pain returned after 8 months and was subsequently eliminated with a repeat block. There were no complications.